Table 4.
Unadjusted Postoperative Procedural Intervention Rates among Patients of Surgeons with Different Surgeon Characteristics by Surgeon Volume Group
| Surgeon characteristics | n | Surgeon volume groups | ||||
|---|---|---|---|---|---|---|
| Very low, PPI rate (CI) | Low, PPI rate (CI) | Medium, PPI rate (CI) | High, PPI rate (CI) | Very high, PPI rate (CI) | ||
| All surgeons | 6,000 | 5.9 (4.6–7.2) | 5.9 (4.7–7.1) | 5.5 (4.4–6.6) | 6.2 (4.5–7.8) | 3.0 (1.6–4.3) |
| Gender | ||||||
| Male | 5,592 | 5.7 (4.4–7.0) | 6.0 (4.8–7.2) | 5.6 (4.5–6.7) | 6.0 (4.4–7.6) | 3.3 (1.8–4.8) |
| Female | 327 | 9.0 (3.0–14.9) | 4.5 (0.5–9.4) | 3.8 (1.4–9.1) | 10.7 (0.7–22.2) | 1.1 (1.0–3.2) |
| Surgeon age, y | ||||||
| < 40* | 1,155 | 9.0 (3.4–5.6) | 5.7 (3.2–8.2) | 5.2 (2.7–7.7) | 2.7 (0.3–5.7) | 2.2 (0.3–4.6) |
| 40–49 | 2,296 | 4.1 (2.0–6.1) | 5.7 (3.8–7.6) | 4.8 (3.1–6.4) | 4.8 (2.6–7.0) | 3.1 (1.2–5.0) |
| 50–59 | 1,639 | 4.3 (2.1–6.5) | 6.1 (3.7–8.6) | 5.6 (3.6–7.6) | 7.1 (4.3–10.0) | 3.1 (0.1–6.1) |
| ≥ 60 | 829 | 7.3 (4.3–10.3) | 6.3 (3.4–9.2) | 8.4 (4.6–12.2) | 18.8 (7.7–29.8) | 5.0 (4.6–14.6) |
| Practice location | ||||||
| Urban | 4,768 | 5.7 (4.3–7.1) | 5.9 (4.6–7.3) | 5.2 (4.0–6.5) | 5.7 (3.9–7.4) | 3.3 (1.8–4.8) |
| Large rural | 437 | 5.5 (0.3–10.7) | 8.0 (3.2–12.8) | 5.1 (1.6–8.5) | 4.9 (0.5–10.3) | 0 |
| Small rural | 386 | 7.2 (1.1–13.4) | 4.0 (0.2–7.8) | 8.6 (3.7–13.4) | 10.4 (3.1–17.8) | 0 |
| Isolated small rural | 397 | 7.3 (1.7–13.0) | 3.8 (0.2–7.5) | 4.1 (0.9–7.3) | 8.9 (0.6–17.2) | 0 |
| Board certification | ||||||
| General surgery | 3,960 | 5.7 (4.3–7.2) | 5.8 (4.6–7.1) | 5.5 (4.3–6.8) | 4.8 (2.5–7.1) | 2.4 (0.9–5.6) |
| Colorectal surgery | 1,489 | 3.5 (1.3–8.3) | 3.6 (0.1–7.0) | 4.5 (2.2–6.8) | 6.6 (4.4–8.8) | 3.1 (1.6–4.5) |
| Board certified, but not GS, CR | 27 | 5.9 (−.5.3–17.1) | 0 | 0 | 0 | 0 |
| No certification | 443 | 7.9 (3.8–12.1) | 8.7 (4.0–13.4) | 8.7 (3.5–13.8) | 15.4 (1.5–29.3) | 0 |
| Years in practice | ||||||
| 1–14 | 1,616 | 7.4 (4.7–10.2) | 5.4 (3.3–7.5) | 5.4 (3.2–7.6) | 4.0 (1.3–6.8) | 2.5 (0.3–4.7) |
| 15–24 | 2,060 | 4.7 (2.5–7.0) | 6.2 (4.1–8.2) | 4.5 (2.8–6.1) | 4.5 (2.3–6.7) | 2.5 (0.7–4.4) |
| 25–34 | 1,573 | 5.1 (2.7–7.6) | 6.1 (3.6–8.5) | 6.2 (4.1–8.3) | 9.4 (6.0–12.8) | 4.9 (1.1–8.7) |
| ≥ 35 | 670 | 6.4 (3.4–9.4) | 6.1 (3.0–9.2) | 8.2 (3.7–12.6) | 8.8 (0.7–18.4) | 0 |
| Hospital volume | ||||||
| Very low | 1,432 | 5.0 (3.2–6.8) | 5.7 (3.5–7.8) | 4.0 (1.9–6.2) | 8.2 (1.3–15.1) | 0 |
| Low | 1,607 | 5.8 (3.2–8.4) | 5.5 (3.5–7.5) | 6.1 (4.1–8.2) | 8.3 (4.6–11.9) | 11.4 (2.0–20.7) |
| Medium | 1,391 | 7.3 (3.6–11.0) | 4.6 (2.3–6.9) | 6.6 (4.4–8.8) | 5.3 (2.4–8.2) | 1.9 (0.2–4.0) |
| High | 773 | 5.8 (1.6–10.0) | 7.8 (3.7–11.9) | 4.5 (1.5–7.6) | 5.5 (2.4–8.7) | 5.4 (1.2–9.6) |
| Very high* | 732 | 7.0 (1.1–13.0) | 8.2 (3.3–13.1) | 2.6 (0.1–5.0) | 4.0 (0.6–7.4) | 1.6 (0.0–3.1) |
| Solo practice | ||||||
| No | 3,594 | 5.5 (3.8–7.2) | 5.9 (4.4–7.4) | 4.9 (3.6–6.2) | 6.1 (4.0–8.2) | 2.9 (1.3–4.4) |
| Yes | 2,325 | 6.5 (4.4–8.6) | 5.9 (4.1–7.7) | 6.5 (4.6–8.4) | 6.3 (3.7–8.8) | 3.1 (0.4–5.9) |
PPI rates are the percentage of patients undergoing postoperative procedural intervention. Negative numbers in confidence intervals relate to sample size < 50 in the cell.
*
Individual row chi-square p ≤ 0.05.
CR, colorectal surgery; GS, general surgery; PPI, postoperative procedural intervention.